Question 13 A sales manager for an advertising agency believes there is a relationship between the number of contacts and the amount of the sales. To verify this believe, the following data was collected: Salesperson 1 2 Number of Contacts Sales (in thousands) 14 24 14 4 12 20 16 46 23 48 28 30 80 30 7 90 8 50 85 9 55 120 10 50 110 Reference: 13-4 What is the value of the coefficient of correlation?